My my is my second gen developing an interesting set of noises lately.
About 500 miles ago I developed the famous brake pad clank. Loving that.
Most recent item is a "ping" when shifting into reverse. Doesn't matter where I shift from. Neutral to reverse or park to reverse, as soon as the tranny slots into reverse the ping is audible.
Sounds like it is coming from the tranny, but you know how it is when listening from the driver's seat.
I've read some items on other sites about driveshaft play being responsible for this when the driveshaft nuts don't seat completely on the transfer case output flange. I did recently install a Tom Woods driveshaft, so I'll be getting under the truck and re-checking TQ on all the bolts at both ends, and making sure the relieved area on the DS for bolt/nut seating isn't too small.
Other than that, any other ideas? Would prefer to have peace of mind that my tranny isn't about to shit.
Got under the truck today. Ping is definitely internal, inside the transfer case. I can reproduce it by grabbing the front drive shaft, rotating it one direction, and then forcefully, suddenly rotating it in the other direction. It sounds like it's just the front driveline taking up gear lash when switching direction of rotation.
There's about 1/8" of play in the front DS with rotation. Anyone know if this is about right for 2gen 4x4s? I'd hate for the T-case gearing to be loose already...this truck has just under 14k miles on it...albeit, the t-case has been doing serious work for about half of those...
Anyway, changed the t-case fluid while I was under there. The sound is still there but the volume was cut by about 60% after the change. t-case fluid was Mobil 1 synthetic 75w-90 with about 13k miles on it. Was replaced with the same. I'm thinking the lube may have just been done - the truck has seen a lot of creek crossings and hot-weather wheeling which may have broken the lube down surprisingly quickly. It looked about like I would expect though when drained - coloration was as expected, no debris.
I'm open to other input, but I'm thinking this may just be a one-off noise my truck is going to make. If the problem seems to worsen, I may knock open the t-case for a visual inspection. I'll keep everyone posted.